Removed classcat and reworked class types from string to ClassValue

packages/svelte/src/lib/container/Panel/Panel.svelte

@@ -1,5 +1,4 @@
 <script lang="ts">
-  import cc from 'classcat';
   import type { PanelProps } from './types';
   import { useStore } from '$lib/store';
 
@@ -17,7 +16,7 @@
 </script>
 
 <div
-  class={cc(['svelte-flow__panel', className, ...positionClasses])}
+  class={['svelte-flow__panel', className, ...positionClasses]}
   {style}
   style:pointer-events={store.selectionRectMode ? 'none' : ''}
   {...restProps}